% Listing 17-7 - Constructing a simple graph
% edge weights
    cost = [2 2 2 2 2 3 3 3 3 1 2 1 3];
% edge directions
    dir =  [2 2 2 2 2 2 2 2 2 2 2 2 2];
% connectivity
    node = [ 1  2  3 4 5; ...     % edges from A
             1  6  7 0 0; ...     % edges from B
             2  7  8 0 0; ...     % edges from C
             3  8  9 0 0; ...     % edges from D
             4 11 13 9 0; ...     % edges from E
             5  6 10 0 0; ...     % edges from F
            10 11 12 0 0; ...     % edges from G
            12 13  0 0 0];        % edges from H
% coordinates
    coord = [ 5 6; ... % A
              3 9; ... % B
              1 6; ... % C
              3 1; ... % D
              6 2; ... % E
              6 8; ... % F
              9 7; ... % G
              10 2];   % H
    A = grAdjacency( node, cost, dir )

